Dump all the key from Hashmap to a vector

I wish to dump all the keys from Hashmap to a vector, how to do it?(The concern here is the performance, I wish to use the minimal resources to do this, however, any suggestion is welcome)
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william007Asked:
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objectsCommented:
Vector v = new Vector(map.keySet());
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StillUnAwareCommented:
I guess the best way would be to use the functions API provides:

Vector v = new Vector();
v.addAll(hashMap.keySet());
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sriki77Commented:
why do you need vector, use the set itself. You have all the power of the collections api on the Set too.
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Mayank SAssociate Director - Product EngineeringCommented:
>> The concern here is the performance

BTW, I doubt if Vector will give you better performance than the set itself.
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william007Author Commented:
Thanks:-)
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